<template>
    <div class='home-category' @mouseleave="currLi=null">
        <ul class="menu">
            <li :class="{ active: currLi&&currLi.id === item.id }" v-for="item in menuList" :key="item.id"
                @mouseenter="handleMenu(item)">
                <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
                <template v-if="item.children">
                    <RouterLink v-for="c in item.children.slice(0, 2)" :to="`/category/sub/${c.id}`">{{ c.name }}
                    </RouterLink>
                </template>
                <template v-else>
                    <Skeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
                    <Skeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
                </template>
            </li>
        </ul>
        <!-- 弹层 -->
        <div class="layer" v-if="currLi">
            <h4>{{ currLi.id === 'brand' ? '品牌' : '分类' }}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
            <ul v-if="currLi && currLi.goods && currLi.goods.length">
                <li v-for="item in currLi.goods" :key="item.id">
                    <RouterLink :to="`/product/${item.id}`">
                        <img v-lazy="item.picture" alt="">
                        <div class="info">
                            <p class="name ellipsis-2">{{ item.name }}</p>
                            <p class="desc ellipsis">{{ item.desc }}</p>
                            <p class="price"><i>¥</i>{{ item.price }}</p>
                        </div>
                    </RouterLink>
                </li>
            </ul>
            <ul v-if="currLi && currLi.brands && currLi.brands.length">
                <li class="brand" v-for="item in currLi.brands" :key="item.id">
                    <RouterLink to="/">
                        <img v-lazy="item.picture" alt="">
                        <div class="info">
                            <p class="place"><i class="iconfont icon-dingwei"></i>{{ item.place }}</p>
                            <p class="name ellipsis">{{ item.name }}</p>
                            <p class="desc ellipsis-2">{{ item.desc }}</p>
                        </div>
                    </RouterLink>
                </li>
            </ul>
        </div>
    </div>
</template>

<script setup>
import { getBrand } from '@/api/home'
import { useCategoryStore } from '@/store/category'
import { ref, reactive, computed } from 'vue'
const userCategory = useCategoryStore()

const brand = reactive({
    id: 'brand',
    name: '品牌',
    children: [{ id: 'brand-chilren', name: '品牌推荐' }],
    brands: []
})
const menuList = computed(() => {
    const list = userCategory.topNavList.map(item => {
        return {
            id: item.id,
            name: item.name,
            children: item.children,
            goods: item.goods
        }
    })
    list.push(brand)
    return list
})

// 当前鼠标移入的li
const currLi = ref(null)
const handleMenu = (item) => {
    currLi.value = menuList.value.find(m => m.id === item.id)
}

// 获取品牌的数据
getBrand({limit: 6}).then(data => {
    brand.brands = data.result
})

</script>

<style scoped lang='scss'>
.home-category {
    width: 250px;
    height: 500px;
    background: rgba(0, 0, 0, 0.8);
    position: relative;
    z-index: 99;

    .menu {
        li {
            padding-left: 40px;
            height: 50px;
            line-height: 50px;

            &:hover,
            &.active {
                background: $mainColor;
            }

            a {
                margin-right: 4px;
                color: #fff;

                &:first-child {
                    font-size: 16px;
                }
            }
        }
    }

    // 弹出层样式
    .layer {
        width: 990px;
        height: 500px;
        background: rgba(255, 255, 255, 0.8);
        position: absolute;
        left: 250px;
        top: 0;
        display: none;
        padding: 0 15px;

        h4 {
            font-size: 20px;
            font-weight: normal;
            line-height: 80px;

            small {
                font-size: 16px;
                color: #666;
            }
        }

        ul {
            display: flex;
            flex-wrap: wrap;

            li {
                width: 310px;
                height: 120px;
                margin-right: 15px;
                margin-bottom: 15px;
                border: 1px solid #eee;
                border-radius: 4px;
                background: #fff;

                &:nth-child(3n) {
                    margin-right: 0;
                }

                a {
                    display: flex;
                    width: 100%;
                    height: 100%;
                    align-items: center;
                    padding: 10px;

                    &:hover {
                        background: #e3f9f4;
                    }

                    img {
                        width: 95px;
                        height: 95px;
                    }

                    .info {
                        padding-left: 10px;
                        line-height: 24px;
                        width: 190px;

                        .name {
                            font-size: 16px;
                            color: #666;
                        }

                        .desc {
                            color: #999;
                        }

                        .price {
                            font-size: 22px;
                            color: $priceColor;

                            i {
                                font-size: 16px;
                            }
                        }
                    }
                }
            }

            // 品牌的样式
            li.brand {
                height: 180px;

                a {
                    align-items: flex-start;

                    img {
                        width: 120px;
                        height: 160px;
                    }

                    .info {
                        p {
                            margin-top: 8px;
                        }

                        .place {
                            color: #999;
                        }
                    }
                }
            }
        }
    }

    &:hover {
        .layer {
            display: block;
        }
    }
}

// 骨架动画
.skeleton {
    animation: fade 1s linear infinite alternate;
}

@keyframes fade {
    from {
        opacity: 0.2;
    }

    to {
        opacity: 1;
    }
}
</style>